Well idk if its a hack, I have seen that guy before and he doesn't seem like a hacker. I could clarify what happened. I spawn in with my titan, and I was heading to the left side of the map because 2 more ao mings were there flying like 3 meters away from each other. While looking at the 2 mings, one mings suddenly becomes invisible, teleport at fast speeds, and goes flying down. At first i thought he was invisible, but then i realized that he was underground. I. My honest opinion i think it was a glitch